noun, used as a suffix
pluralizing suffix for people; -s; group of
Attaches to nouns referring to people to form a plural, often with a derogatory or rough tone. Common in words like やつばら (those guys) and せがればら (sons).
あのやつばらは何を考えているんだ。
What are those guys thinking?
せがればらが集まって騒いでいる。
The sons are gathered and making a racket.
The historical derivation is uncertain; the suffix is used in colloquial Japanese to form derogatory plurals.